Impedance protection
Table 27. Power swing detection ZMRPSB
Function
Range or value
Accuracy
Reactive reach
(0.10-3000.00)
W
/phase
± 2.0% static accuracy
Conditions:
Voltage range: (0.1-1.1) x U
r
Current range: (0.5-30) x I
r
Angle: at 0 degrees and 85 degrees
Resistive reach
(0.10–1000.00)
W
/phase
Timers
(0.000-60.000) s
± 0.5% ± 10 ms
Minimum operate current
(5-30)% of IBase
± 1.0% of I
r
Table 28. Underimpedance protection for generators and transformers ZGCPDIS
Function
Range or value
Accuracy
Number of zones
3
-
Forward positive sequence impedance
(0.005-3000.000) Ω/
phase
± 2.0% static accuracy
Conditions:
• Voltage range: (0.1-1.1) x U
r
• Current range: (0.5-30) x I
r
• Angle: at 85 degrees
Reverse positive sequence impedance
(0.005-3000.000) Ω/
phase
-
Angle for positive sequence impedance,
(10-90) degrees
-
Timers
(0.000-60.000) s
± 0.5% ± 10 ms
Operate time
25 ms typically
-
Reset ratio
105% typically
-
Table 29. Loss of excitation LEXPDIS
Function
Range or value
Accuracy
X offset of Mho top point
(–1000.00–1000.00)% of Z
Base
± 2.0% of U
r
/I
r
Diameter of Mho circle
(0.01–3000.00)% of Z
Base
± 2.0% of U
r
/Ir
Timers
(0.00–6000.00) s
± 0.5% ± 25 ms
Operate time
55 ms typically
-
Reset ratio
105% typically
-
Table 30. Out-of-step protection OOSPPAM
Function
Range or value
Accuracy
Impedance reach
(0.00–1000.00)% of Zbase
± 2.0% of Ur/Ir
Characteristic angle
(72.00–90.00) degrees
± 5.0 degrees
Start and trip angles
(0.0–180.0) degrees
± 5.0 degrees
Zone 1 and Zone 2 trip counters
(1-20)
-
Generator protection REG650
1MRK 502 050-BEN B
Product version: 1.3
ABB
41
